Table 3

 Predictors of change in disability at three months (R2 = 0.49) and 12 months (R2 = 0.47): results of the multiple linear regression analyses

3 Months (n = 157)12 Months (n = 151)
nb*95% CIp Valuenb*95% CIp Value
*b positive: favourable change in disability since baseline per unit of the independent predictor; b negative: unfavourable change in disability since baseline per unit of the independent predictor.
†Higher score means less social support.
b, regression coefficient; CI, confidence interval.
Sociodemographic factors
Employed (v unemployed)955.43(1.26 to 9.61)0.01
No children (v having children)804.96(0.98 to 8.93)0.01
Baseline score
More severe pain (per point increase)157−1.88(−3.13 to −0.63)0.00150−1.37(−2.99 to 0.25)0.10
More disabled (per point increase)1560.58(0.45 to 0.72)0.001510.71(0.54 to 0.87)0.00
Characteristics of complaint
Duration of current episode:
    <1 week80.0070.00
    1 week to 1 month44−8.67(−19.40 to 2.06)0.1142−10.10(−23.94 to 3.73)0.15
    1 month to 6 months66−9.10(−19.44 to 1.25)0.0864−11.30(−24.87 to 2.27)0.10
    >6 months36−12.18(−23.07 to −1.28)0.0336−14.84(−29.14 to −0.53)0.04
History of complaints (v no history)83−9.77(−15.97 to −3.57)0.00
Putative cause: accident (v “no”)138.58(1.09 to 16.07)0.03
Putative cause: chronic disease (v “no”)10−10.07(−21.27 to 1.12)0.08
Complaints at hip/knee (v “no”)37−9.21(−16.04 to −2.38)0.01
Multiple musculoskeletal complaints (v “no”)24−9.66(−15.56 to −3.77)0.00
Psychosocial factors
Coping: more retreating (per point increase)155−0.88(−1.42 to −0.34)0.00150−0.92(−1.72 to −0.12)0.03
Coping: worrying (per point increase)150−0.68(−1.33 to −0.03)0.04
Social support†
    medium69−4.69(−9.38 to 0.01)0.05
    high35−2.78(−8.50 to 2.94)0.34